Ok, specifics first. I have a 93 Accord 10 year anniv. edition, automatic tranny. Today I tried to put the vehicle into D4 from park, and it wouldn't shift. The button wouldn't go all the way in. After putting my key into the Shift Lock Release, the vehicle finally went into drive. Drove it home, nearly 20 miles, at 65 mph. My RPMs on the tach never went over 2900, the transmission didn't slip at all (high RPMS) and there were no lights (check engine light or a flashing D4 would have been a dead giveaway, neither happened) and the vehicle drove fine. Once home, I put the vehicle into park and tried to put it back into reverse, same thing. I did the Shift Lock Release again, and it worked. Everyone I have spoken to believes the problem to be low Tranny fluid. I am taking the car to a mechanic tommorow for an oil change and fluid check. Is it low transmission fluid, or another problem altogether?